If Dailymotion videos refuse to start in Firefox, it could indicate an issue with your browser. If the video plays in Internet Explorer or Chrome without issue, you may need to check your plug-ins and add-ons to resolve the problem.

Browser Reset

First, you should try restarting your browser and playing the video. If this fails to work, you can empty your browser cache by selecting "Tools" from the menu, then "Options," then "Advanced" and clicking the "Clear Now" button. Restart your browser and try the video again.

Flash or Script Blockers

A common Firefox add-on is one designed to prevent scripts from running, such as Flashblock or NoScript. These add-ons will also prevent videos from playing. Disable any such add-ons, or white list Dailymotion in their configuration settings, and they should allow the video to start. In addition, ad-blocking plug-ins may also interfere with video playback on Dailymotion.

Flash Upgrade

The problem also might result from an out-of-date Flash install. Update your Flash player installation to see if that solves the issue. You may also need to update your video drivers to restore functionality.

About the Author

Milton Kazmeyer has worked in the insurance, financial and manufacturing fields and also served as a federal contractor. He began his writing career in 2007 and now works full-time as a writer and transcriptionist. His primary fields of expertise include computers, astronomy, alternative energy sources and the environment.